The Honda 78122-954-000 Adjuster Shim is a genuine OEM replacement designed for WA20 and WA30 water pumps. Sourced directly from Honda, this shim carries the exact dimensions Honda specifies, so there is no guesswork when it comes to restoring proper clearance or alignment during service. Confirm your pump's serial number against the fitment table before ordering, as Honda updates parts at defined production breaks.
Key Features
- Genuine Honda OEM — manufactured to Honda's own specification, ensuring the shim matches the original dimensions exactly as fitted on the production line.
- Precise Clearance Restoration — shims control critical spacing within the pump assembly; using the correct thickness maintains proper operating tolerances and prevents premature wear on adjacent components.
- Fits WA20 and WA30 Water Pumps — confirmed for both models; check your serial number against the fitment table to verify this is the correct shim for your production run.
An adjuster shim is a thin, precision-dimensioned spacer used during assembly or service to set and maintain exact clearances between moving or mating components inside the pump. When a shim wears, deforms, or is omitted during reassembly, running tolerances shift, leading to accelerated wear, vibration, or loss of performance in the pump. Replacing it with the correct Honda OEM shim restores the clearances the pump was engineered to operate within.
Part Details
| Part Number | 78122-954-000 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Adjuster Shim |
Compatibility & Fitment
| Name | Models | Serial Range |
|---|---|---|
| Water Pump | WA20, WA30 | All |
Verify Before You Order
Fitment is machine-number and revision-specific; always confirm your model and serial number against the fitment list.
Why Buy From DHS Equipment
Every part is verified against the manufacturer's part number before it ships, so what you order is what arrives. We carry parts from leading OEM brands and our own DHS Quality Parts line of professional aftermarket components. Need help finding the right part? Our team is available to confirm compatibility whenever you need it. Orders are processed fast to keep your jobs on track. We don't just sell parts. We keep you jobsite ready.
Questions? Contact our team at [email protected] or 866-611-9369 — DHS Equipment is here to help you maintain peak performance.
